Interesting to note that 70% of divorces in China are initiated by women on grounds of incompatibility, extra marital affairs and domestic violence. Furthermore, in a recent poll , only 6% of Chinese consider themselves happy with their lives (placed around 150th in the world).

So the chances of a chinese girl getting married and living happily ever after is so low you'd might as well go to Macau.

When I was young and back in Brazil, long time ago, we used to wonder why the girls from our town preferred the guys from other towns at the dances. So this is not restricted to Chinese girls liking foreigners.

It must be embedded in the genes.

Is nature pushing for mutation, looking for a stronger breed to survive.

Intermarrying is known to weaken the race, see what happened to European royalty in the old days.